I had vats talc pleurodesis for pneumothorax 7 years ago.now, chronic breathing discomfort/feeling of movement in chest (fluid/air).what could it be?

Pneumothorax treated: You are a male most likely thin patient with a spontaneous pneumothorax that was treated with talc pleurodesis. New modalities include mechanical pleurodesis after blebectomy. You may need another x-ray to look at the lungs. The talc prevents the occurrence of pneumothorax but it does not change your underlying lungs. See your doctor for x-ray possible ct scan.

Need X-ray: May be nothing , but localized recurrent pneumo can occur and opposite side can as well. Hopefully you stopped smoking!